Best Boltsize-It in 2026

Quickly and easily size bolts, screws, nuts and twist drills

Features ruler marked with inches and millimeters

Gauge metric hex nuts and washers by holding under metric holes

"QUICKLY IDENTIFY BOLTS AND NUTS - The SST Identibolt is your One-stop Shop for Verifying the Size and Thread Pitch of All Your Standard Hardware! Never Again Wonder What Size Fastener You Have! Easily Distinguish Between Metric and Inch Thread Sizes, and Quickly Measure Bolt Lengths and Nut Diameters (Unless You'll Miss Making Multiple Trips to the Hardware Store)"

ULTIMATE NUT AND BOLT IDENTIFICATION TOOL - The Identibolt Measures Common Imperial SAE and Metric Thread Sizes, Identifying Hardware from #6 to ½" & 4mm to 14mm. Each Size is Accompanied By a Male Thread (for Nuts and Washers), and a Female Thread (for Bolts and Screws).

DURABLE AND BUILT TO LAST - SST's 4"x20" Solid Metal Plate Construction is Hard Anodized for Maximum Thread Strength, With Laser Etched Markings that Will Never Fade or Get Scratched off. Multiple Mounting Holes Give You the Option to Wall Mount it, Secure it in Your Toolbox, or Keep it on Your Workbench!

Quickly and easily size bolts, screws, nuts and twist drills

Features ruler marked with inches and millimeters

Gauge metric hex nuts and washers by holding under metric holes

🔦【CKE Patent Design Detachable Nut & Bolt Thread Checker】The Inch & Metric Thread Checker design with detachable wire loop in both ends, you can open or off to use anywhere, provides more possibilities for using space. Also you can select individuals or parts to use or take out frequently used parts and use them in a single wie loop. This is a great design based on thousands of of CKE Nut & Bolt Thread Checker customers. Conveniently assembled onto a wire loop, it's perfect portable solution!

🔦【Upgraded Double-sided Printing Size】This Nut and Bolt Thread Checker with upgraded double-sided sizes by laser printing, it solve the problem that may need to be rotated to see the size during use, more convenient and faster to use. The laser print marking ensure that the color and mark will not fade after, even will be more obvious a long period of use.

🔦【Zinc Plated for Inch Size - Includes 23 Inch Size part numbers】 6-32, 6-40, 8-32, 10-24, 10-32, 1/4-20, 1/4-28, 5/16-18, 5/16-24, 3/8-16, 3/8-24, 7/16-14, 7/16-20, 1/2-13, 1/2-20, 9/16-12, 9/16-18, 5/8-11, 5/8-18, 3/4-10, 3/4-16,1-8, 1/12

Each leaf is marked with thread pitch

With locking clamp

Inch and metric sizes

Measures diameter, thread pitch & length of nuts, bolts & screws

Measures fractional bolts from size #4 to 1" up to 7" long

Measures metric bolts & screws from size 3mm to 22mm

Top Quality Nut, Bolt & Screw Gauge; For Use With Standard or Metric, Coarse & Fine Diameters, Lengths & Thread Pitches

This gauge has 'MarineBoltSupply' printed on the back

Package Dimensions: 8.75 inch L x 3.25 inch W x 0.25 inch H

81 pc Grade B Steel Gage Block Set with MFG'S certificate

Manufactured under carefully controlled conditions allowing for the highest degrees of accuracy when used at a temperature of 68 degrees F. (20 C).

All gage block sets are assigned serial numbers and accompanied with a certificate of inspection listing the deviation for each block

【Nut & Bolt Thread Checker】 These thread gauges includes 26 male/female gauges - 14 inch & 12 metric.Thread sizes are permanently carved on each gauge with distinct mark, which makes the mark easy for you to tell.

【Efficiency Improving】Big Time Saver No more bent over the container looking for a nut/bolt to finish your project，especially the nut or bolt that cannot be removed，Each size has a nut and bolt checker on the same gauge， Excellent item for the mechanic Every workshop should have one.

【High Quality Material】 These nut & bolt thread checkers are made of strong material. Inch gauges are clear zinc plated, metric gauges are black oxide.

Inch and Metric & Coarse and Fine Threading

Measures fractional bolts from size #4 to 1" up to 7" long

Measures metric bolts & screws from size 3mm to 22mm

🔩 [Upgraded Thread Checking Set] Every thread checker is inserted into well cut foam that holds them firmly in place to prevent them from bouncing around in the box, but not so tight that you can easily remove them. Easier to use than connected nut/thread checkers, because you no longer have to carry a whole bunch of gauges to measure individual screws or nuts and can reach any tight spot.

🔩 [Lifesaver Before Heading to Hardware Store] Just screw the nut or bolt into the screw thread gauge, it takes you a few seconds to check the size. You do not need to drive forth and back to and from the hardware and auto parts stores for check any more. Also, this nut and bolt gauge is especially well suitable for the distinguish between similar inch and metric threads.

🔩 [Zinc Plated for Inch Size] Includes 14 Inch Size part numbers: 6-32, 8-32, 10-24, 10-32, 1/4-20, 1/4-28, 5/16-18, 5/16-24, 3/8-16, 3/8-24, 7/16-14, 7/16-20, 1/2-13, 1/2-20.

[Size]:0.061-0.250", minus tolerance: 0.0002", Length: 2"±0.01", Step: 0.001", HRC: 60-62,

[Features]: Each gage hole is clearly marked; pin gage is heat treated and size info is etched on each pin gage with no sharp corners;

[Product includes]: Storage case; 190pcs pin gages

Quickly and accurately determine the screws size

Recommends the drill bit or tap size needed for the screw

Standard & Metric

It is 55 Degree & 60 Degree Thread / Screw Pitch Gauge gage with lock up device. Typically used to check the thread size determination is correct

Specification: Metric & Imperial & US; Metric: 6.0, 5.5, 5.0, 4.5, 4.0, 3.5, 3.0, 2.5, 2.0, 1.75, 1.5, 1.25.1.0, 0.9, 0.8, 0.75, 0.7, 0.6, 0.5, 0.45, 0.4, 0.35, 0.3, 0.25

Imperial: 4G, 4 1/2G, 5G, 6G, 7G, 8G, 9G, 10G, 11G, 12G, 13G, 14G, 16G, 18G, 19G, 20G, 22G, 24G, 25G, 26G, 28G, 30G, 32G, 36G, 40G, 48G, 60G, 62G; US: 8, 10, 11, 14, 19, 28

V-Wac Welding Gauge

Use to: Checks undercut, crown height, porosity, pits

Only Metric

V-WAC Single Weld Gage

Use to: Checks undercut, crown height, porosity, pits

only Inch

Measures all metric threads from .5mm to 6mm

48 wires in 16 different sizes. ~ Measures all 60° threads

3 to 48 threads per inch

Includes a total of 3 diffrent gauges!

1) Drill Bit Gauge (Fractional & Metric) Color: Blue

2) Internally Threaded Screw Gauge Color: White

Nice Bundle: These thread gauges includes 26 male/female gauges - 14 inch & 12 metric. Each size has a nut and bolt checker on the same gauge. The individual gauges rotate freely on the wire cable for fast thread verification.

Efficiency Improving: No more bent over the container looking for a nut/bolt to finish your project. Identifying the size and thread of nuts and bolts before making trips to the hardware store to match them, especially the nut or bolt that cannot be removed.

Handy Tool Which You Should Have One: Excellent item for the mechanic; Applicable to mechanical repairs, or common threads in plumbing, air and gas connections, etc. Organize your garage and sort your nut & bolt with this nice tool, save your valuable time.

【Upgraded Bundle】This nut and bolt thread checker set includes 26 individual thread gauges - 14 inch size & 12 metric size. All gauges is inserted in a EVA holder and encased into a portable PVC case, which is water-proof and rust-proof. Provide better protection and never lose each single gauges. It also comes with a string which 26 gauges can be stung on if you like.

【More Flexibility】Just take a single gauge from the case to check the screw size simply. Easily to reach confined areas as you wish. No more cutting the awkward wire by yourself. No more twist the entire wire painfully to check a fixed bolt or a threaded hole, especially in a narrow corner or some tight spots.

【Easy to Read】Strong laser printed label on each individual bolt nut gauge. There are also one-to-one labels on EVA holder and sticker of case for easy reference and use. No more held it at a right angle in decent light to read the markings.

Nut and bolt thread checker: These bolt thread gauge includes 26 male/female gauges - 14 inch & 12 metric. Each size has a nut and bolt checker on the same gauge. Thread sizes are permanently carved on each bolt and nut size and thread gauge with distinct mark.

Clear zinc plated are inch gauges: Includes 14 Inch size part numbers: 6-32, 8-32, 10-24, 10-32, 1/4-20, 1/4-28, 5/16-18, 5/16-24, 3/8-16, 3/8-24, 7/16-14, 7/16-20, 1/2-13, 1/2-20.

Black oxide are metric gauges: Includes 12 metric sizes part numbers: M4x0.7, M5x0.8, M6x1.0, M7x1.0, M8x1.0, M8x1.25, M10x1.0, M10x1.25, M10x1.5, M12x1.25, M12x1.5, M12x1.75.

Range 0.7" to 6" diameter, Measures bore to 10" deep

Super Precision Deep Measuring Bore Gauge

Accuracy: 0.0005" with Crisp Precision Graduations

Sturdy Steel Construction - Made of 65 manganese steel by heat treatment, high strength, corrosion resistance and no rust, long life.

Gages Range - 4 sizes of gages are supplied in a fitted case. Incl. 1/8"-1/5",1/5"-3/10",3/10"-2/5",2/5"-1/2"

Adjustment - Smooth, sensitive adjustment for better feel, giving more accurate measurements

29 Holes measurement: 29-hole sizes remain constant, providing precision accuracy; The drill sizes in both inches and decimal equivalents, equivalents range from 1/16 inch to 1/2 inch by 1/64 inch, come with clearly marked fractions and decimal for accurate measurement

Exquisite design: heavy gauge steel construction is machined and ground to close tolerances, it can quickly and conveniently identify drill bit diameter; With a hanging hole design for easy hanging, which provides convenience for your work

Durable material: well constructed of stainless steel, it is sturdy and durable, helps to gauge the drill bits quickly and easily when working with older, unmarked drill bits and bits that are too small to fit diameter markings, practical equipment in home tools box

Both Metric and Stadard reading | Welding taper gauge: 1-15mm (1/64-5/8 inch)

Accurate figures and increments are etched into surface, easy to read

Polished, bright and clean without burr, rust laser engraved line and will not rub off

【Function】-- 2 In 1 set Screw Thread Pitch Gauge Tool, Pitch Cutting Gauge Caliper Gages Measuring Tool; 51Pcs Blade America SAE Type and 58Pcs Blade Metric & America SAE Type & British Whitworth

【Wide application】-- Accurately measures internal and external screw threads with thread blades of varied size;Use to provide the correct size drill bit, or to size fastener to determine what bit should to use. Used for checking tool angle while cutting threads in metal turning lathes, accurately measures internal and external screw threads with thread blades of varied size

【Material】--Stainless steel and chrome finish, it combines high strength, good resilience, elegant appearance. Not easy to rust and long lasting durability

★【What You Get】: In this thread pitch gauge kit, it include 51Pcs America SAE type, 52pcs metric and Inch type, 3pcs metric & america SAE type & British Whitworth, they are well packed in a plastic box, easy for carry and store.

★【High Quality】: All the thread pitch gauge are made of stainless steel, heat processed with chrome finish, high strength, good resilience, elegant appearance. Surface polished smooth, applying anti-rust oil to prevent rust.

★【Measuring Range】: 51pcs America SAE type measuring range is 4-84; 58pcs Metric & America SAE Type & British Whitworth Metric is 0.25-6.0mm, Imperial is 4G-62G US: 8, 10, 11, 14, 19, 28.

【Clear Marking】 : There is a small hole at both ends, which is convenient for adjustment and disassembly with screws. You can easily rotate the thread pitch gauge blade where you press the tooth thread gauge. The numbers are clearly marked and easy to read.

【Material】 : Screw gauge tool set is made of stainless steel and processed with chrome finish. Surface polished smooth, applying anti-rust oil to prevent rust.good resilience, elegant appearance.

【Measuring Range】: 51 pcs America SAE type measuring range is 4-84; 52 pcs Metric & America SAE Type & British Whitworth Metric is 0.25-6.0mm, Imperial is 4G-62G US: 8, 10, 11, 14, 19, 28.

Made of quality stainless steel and processed with chrome finish, it combines high strength, good resilience, elegant appearance. Not easy to rust and long lasting durability

The America SAE type thread pitch gauge has 51 pieces tablets.The metric and Inch and SAE type thread pitch gauge has 58 pieces tablets, 24 tablets of which are metric, 28 tablets are Inch and 6 tablets are America SAE

Well Made: The toothed edges are sharply defined and the numbers are stamped and easy to read